10x45-55 CL3 Countersunk Head with Wings Self-drilling Screw

Product Overview
This product is a #10, 45/55mm countersunk wing-tip self-drilling screw, made of heat-treated carbon steel with a CL3 mechanical galvanization anti-corrosion finish. It integrates a countersunk head, wing-tip hole-expanding structure, and self-drilling tail. Specifically designed for wood + thin light steel composite connections, it requires no pre-drilling and completes drilling and locking in one go. The screw head can be completely embedded into the board, balancing fastening strength and aesthetics. Suitable for humid indoor and moderate outdoor corrosive environments.

Product Applications
Light Steel Wooden Houses: Fixing wood beams/lumber to light steel keel frames.
Outdoor Woodwork: Installing exterior anti-corrosive wood walls, terrace walkways, and wood decking to steel purlins.
Indoor Construction: Fixing wood ceilings, solid wood wall panels to light steel keels.
Steel-Wood Components: Connecting wooden door/window frames, rain shed wooden beams to galvanized steel brackets.